linderpat

Great story Van, and I love Greg's added commentary. What a car!

GregBBRD

My brain needs a reset to reality.....

I drove Van's car, everyday, for about two weeks....back and forth to work, looking for any and every flaw I could find. I drive some car, almost everyday, so I can make sure the cars we fix are actually fixed. Mary and I share a ride to work, so it is not a big deal for me to do this....it gives me 25-30 minutes of "peaceful" time to really check cars over (each way)....mostly just cruising along, with one place I can floor the cars and see how they perform at WOT. I get to check how they work warm and in the morning, I get to check to see how they work cold.

The problem....I've been driving a couple of GT's and a GTS back and forth, this week. After Van's car, these cars are....well.....disappointing.. Great to cruise along in, but at the WOT section....I feel like I need to grab a newspaper or make a phone call, to make the time go quicker.

I really miss that "Star Wars" feeling of the acceleration when I hit the warp drive pedal.

Where is the reset button?

Rob Edwards

There's a Moldex crank there somewhere and a couple of spare parts, build one for yerself!

ptuomov

Kudos to all involved. It's interesting to hear that the S3 long-runner dual-plane intake, ported S3 heads, higher compression, higher displacement, and smart headers are working as the doctor ordered and the crystal ball predicted. That's an awesome "near F.A.S.T" engine, in my opinion. Hard to tell from outside that it's not near stock, even when it's not.

I don't want to pry on business secrets, but what cam specs does this car have? My thinking has been that this combo would like a fair amount of camshaft overlap, but that's just all theory and speculation.

Strosek Ultra

Probably stock or near stock camshafts. A fair amount of camshaft overlap means ITBs if you want to retain good low end driveability. Mr. Brown does not want to reveal any secrets, do not expect a reply.
Åke

The Forgotten On

With larger valves installed, there is without a doubt stock cams in those heads.

They are nearly identical to the GT cams so there is no need to go to more aggressive cams. Especially with 6.5 liters of displacement, a 30% increase over a stock GT, which puts out 330+ Hp.

The only thing choking an S3 engine was the size of the valves. Everything else flowed as well if not better than S4 hardware.

Plus knowing Greg, he likes to stick with genuine Porsche parts as much as possible as they are generally the most reliable.

bureau13

If I win the Lottery on Saturday, I'm sending my car to Greg on Sunday. Make room for me Greg, I'm buying a ticket!

ptuomov

I think that with longer and smaller diameter intake tract, the S3 intake side would benefit from larger camshafts than the S4 intake side. So whatever cams you'd put in a S4 stroker, you'd probably want to put something a little bigger in a S3 stroker. Just my thinking.

GregBBRD

No big secrets, here.

I installed bigger valves into the heads. I used a set of Colin's Tri-flow cams.

Since I wanted to retain the stock '85/'86 air filter and intake tubes (even smaller than those of an S4), I was pretty certain that the engine would run out of air by 6500.

Because of that, I wasn't searching for higher rpm horsepiwer, but trying to maximize torque and driveablity. (Sorry Mr. Kibort.)

The result was as perfect a street engine as I've ever built. The S3 intake system required/allowed some extremely different fuel injection requirements that were very interesting.

The beauty of this engine is the linear torque. You can drive along in any gear, step down on the throttle and get incredibly smooth acceleration. There's no Dr. Jeckle/Mr. Hyde power change in the rpm range....just a continous grunt into "light speed".

It's very different from what I've built before.

ptuomov

Those are pretty big cams, significantly bigger than stock S3 cams. Especially on the exhaust side. I would've not gone bigger than those either.

With those cams and larger displacement, there's going to be a temptation at some point to revise the air snorkel tubes, air box, etc. hardware upstream of the intake manifold zip tube.

GregBBRD

BTW....I used his "mild" street cams, not his more aggressive camshafts. I sent several days with these cams.These cams are well done. The variations from cylinder to cylinder (in terms of opening and closing events) are very close. The camshaft material seems to be first rate. It took a fair amount of "pondering" to figure out where to set the cam timing, with the one intake lobe opening before the other lobe.

You are correct on the intake pieces before the filter.

This is not my first "go around" with an '85/'86 stroker. I built a race engine for a client in Canada and I've built some pretty healthy 5.0 versions of this engine. There is no doubt that the air filter and tubes are the first area that needs improvement....they are significantly smaller than even the S4 pieces. We are working on a couple different ideas to improve this area, without making obvious visual changes.

I'm pretty certain that when we take the break-in tune out and put in the real tune, we will run it on a dyno and get some measurements.....with and without the restrictive air filter pieces. I will also re-check the cam timing to see how far it has changed, once the belt is broken in. It might make more top end horsepower with the cam timing retarded a bit more. I'm already running it a bit retarded and it should retard more as the belt breaks in....but I'm guessing that will probably make very little difference with the stock air filter pieces.

Ducman82

SHOOOOSH! im squirreling them away for my car.

V33

Van- Congratulations man!...Such a very cool car...you are very lucky...I hope to see and hear it in person some day...

Greg- Awesome work as usual! Truly a unique piece of automobile art and science...

The last time we spoke, I thought you mentioned some Euro 16v strokers possibly in the que at the shop...Am very curious...From what you learned with this one, any thoughts to share about upcoming 16v strokers?

Thanks,

Rich

GregBBRD

We started up and ran a 5.4 liter Euro on the test stand, today. Should be in the car in a few weeks. Sounds pretty darn healthy. I've got a 5.9 liter version on the schedule. Should be a monster.

I like the dog! Life good?

Rob Edwards

Ooh, will it still be on the stand tomorrow? You need a good high quality digital audio recording of that .